Masonry cutting machine



April 19, 1960 R. D. GUTTING MASONRY CUTTING MACHINE Filed Dec.

I N V EN TOR. Poke/'7 0 5077577 jlrae United States Patent MASONRY CUTTING MACHINE Robert D. Gutting, Topeka, Kans.

Application December 14, 1956, Serial No. 628,340

1 Claim. (Cl. 125-23) This invention relates to an improved cutting machine and more particularly, to that class of severing devices employing a pair of relatively reciprocable cutting blades, together with a power device for actuating one of the blades.

It is the most important object of the present invention to employ a power jack in a novel manner to efiect the cutting operation by virtue of its beingmounted directly upon the movable cutting element for reciprocation therewith as the relatively movable parts of the jack itself are actuated.

Another important object of the instant invention is to provide novel guide means for the reciprocable cutter serving additionally to mount the immovable cutter element, together with a crosshead from which the jack is suspended.

A further object of the instant invention is to provide novel means of adjustment through use of a screw on the aforementioned crosshead and to which one part of the jack is pivotally secured.

A still further object of the present invention is to provide yieldable means for automatically returning the movable cutter element and one of the jack parts toward one end of their paths of travel.

In the drawing:

Figure l is a perspective view of a masonry cutting machine made pursuant to the instant invention.

Fig. 2 is a vertical, cross-sectional view thereof.

Fig. 3 is a fragmentary, cross-sectional view taken on line III-III of Fig. 2.

Fig. 4 is an enlarged, fragmentary, detailed, cross-sectional view taken on line IV-IV of Fig. 2; and

Fig. 5 is an enlarged, fragmentary, detailed, cross-sectional view taken on line V-V of Fig. 1.

An elongated, downwardly facing, U-shaped base is provided to support all of the components of the cutting machine illustrated in the drawing and to which is attached a pair of spaced, upright guides 12 and 14 suitably braced by a number of gusset plates 16, the upper ends of the guides 12 and 14 being interconnected by a crosshead 18. Each of the guides 12-14 consists of a pair of L-shaped standards 20 disposed to present a space 22 therebetween for receiving a pair of elongated cutter blades 24 and 26.

The blade 26 is rigidly secured to the guides 12 and 14 and extends upwardly through an opening 28 in the bight of base 10. As seen in Figure l, crosshead 18 has a tongue 30 disposed between the standards 20 to hold the same in spaced relationship.

Crosshead 18 carries a screw 32 having a handle 34 on the uppermost end thereof, the screw 32 in turn supporting a hydraulic jack 36 as well as the cutting element 24.

Jack 36 may be of conventional character in that the same is provided with a cylinder 38 having a reciprocable ice piston (not shown) therewithin whose stem 40 projects upwardly beyond the cylinder 38. Cylinder 38 is rigidly secured to a base 42 which is in turn welded or otherwise afiixed directly to the upper edge of reciprocable blade 24. Jack 36 is manipulated to move the cylinder 38 downwardly with respect to the stem 40 through the medium of a handle 44 which is operated in pump-like fashion as is well understood. Upon release of pressure by opening a valve (not shown), the cylinder 38 is permitted to move to the position illustrated in Figs. 1 and 2 and such upward movement is effected by the force of a pair of springs 46 interconnecting the blade 24 and a crossbar 48 inteposed between stem 40 and screw 32.

The crossbar 48 may be connected to the screw 32 and the stem 40 in any suitable manner, but a ball and socket joint is necessary to permit manipulation of handle 34. Thus, a ball 50 is formed on the lower end of screw 32 which is received by a cap 52 threaded on a boss 54 at the upper end of crossbar 48. The means illustrated in Fig. 4 for attaching stem 40 to crossbar 48, includes a plug 56 threaded into the crossbar 48 and receiving an enlargement 58 on the upper end of stem 40.

An elongated brick 60 or other object to be cut through use of the machine is supported by the upper face of base 10 and by the blade 26 at the point of severance in the manner shown by Fig. 2. An adjustable stop 62 on the base 10 includes a pair of interconnected U-shaped members 64 and 66, the member 64 resting upon the base 10 and receiving one end of the brick 60 in abutting relationship thereto as seen in Figure 1. The member 66 straddles the base 10 and is held in place with respect thereto by a pair of opposed clamping screws 68.

Severance of the brick 60 is augmented if the same is gently tapped while force is applied thereto through manipulation of jack 36. Accordingly, a crossshaft 70 rotatably carried by the base 10 and having a handle 72 on one end thereof is provided with a hammer 74 which moves upwardly into engagement with the brick 60 through a notch 76 in the base 10 in the manner illustrated by Fig. 2.

It is manifest from the foregoing that the adjustment of jack 36 through manipulation of screw 32, depends upon the thickness of the article 60 to be cut. When the jack 36 is manipulated through use of handle 44, the blade 24 is forced downwardly against the article 60, the downward movement of the cylinder 38 being against the action of spring 46. Thus, when the hydraulic pressure within cylinder 38 is relieved, springs 46 return the cylinder 38, its base 42 and the blade 24 to the uppermost ends of their paths of travel.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

A cutting machine comprising an elongated stationary, U-shaped base having a bight and a pair of legs, the bight thereof having a top surface for supporting the article to be cut and being provided with an opening therein; a pair of spaced upright guides rigidly secured to the legs of said base and having an elevated crosshead interconnecting the same at the upper ends thereof above said opening, and an upwardly facing, stationary knife interconnecting the lower ends thereof, the cutting edge of said knife protruding upwardly thruogh said opening; an adjusting member depending from said crosshead and vertically reciprocable relative thereto; a jack depending from the member and having a pair of parts vertically reciprocable relatively between said member and said knife, one of said parts being attached to the member by means of a ball and socket joint; a second downwardly facing knife secured to the other of said parts and References Cited in the fil of hi patent UNlTED STATES PATENTS Petermann Mar. 18, 1924 Rowley Apr. 30, 1929 Patterson Sept. 1, 1936 Huber Oct. 14, 1952 Schlough et a1 J an. 29, 1957 

